Screen



Jan. 5, 1932. DOWN- 1,839,379

SCREEN Filea May 5, .928

wuem co v s 'dwrl/J Patented Jan. 5, 1932 UNITED STATES PATENT OFFICE,

EDWIN J. DOWNING, OF DENVER, COLORADO, ASSIGNOR TO GARDNER-DENVER COM- "BANY, 01? DENVER, COLORADO, A CORPORATION OF DELAWARE SCREEN Application filed May 3,

The present invention relates to screensv particularly intended for removing particles of dirt from air used to operate pneumatic tools or the like.

The object is to provide a simple, compact structure that can be placed in the hose line and will occupy but little space, sa1d means constituting an eti'ectlve screen and one which can be easily cleansed.

being provided with an inlet port 8 and theother with an outlet port 9. The terminal portion 6 is provided with opposite longitudinal external ribs 10 preferably formed in the shape of arrows, to indicate that said terminal is the inlet end. The walls of the inlet and outlet ports are internally threaded to receive the sections 11 and 12 of a conduit,

The section 12 is shown in the form'of the usual goose-neck that is attached to the drilling motor of a rock drill.

Located within the chamber 5 and adjacent to the outlet port 9 is a cup 13 whose open end faces the inlet port 8 and has an internal diameter substantially the same as the said inlet port. The bottom of this cup is conical. The side walls of this cup 13 are spaced from the chamber walls except for the provision of webs 14 that serve as supports for the said cup. Obviously therefore, as shown'in Figure 2, there is free communication between the inlet port and the outlet port through the chamberand around the cup13.

A c lindrical 0 en ended screen 15 has its ends fitted into the inner end of the inlet port 8 and the interior of the cup 13; This screen is preferably made of a sheet of resilient metal that can be bent around the finger and placed in position, its expansive action thus assuring its end-s having tight 1928. Serial No. 274,831.-

fits or bearings in the inlet port and cup. To prevent the outward longitudinaldisplacement of the screen, a split ring 16 is fitted into the inner end of the inlet port and the walls thereof at said inner end are provided with a seat 17 to receive the ring 16. This ring thus constitutes an abutment for the outer end of the screen and because of the conical interior formation of the cup and the expansible properties of the screen, said screen will be forced snuglyagainst the ring.

As clearly indicated in Figure 2, air flowing through the conduit must pass into the interior of the screen, thence outwardly there.- through intothe chamber, and on to the outlet around the cup. The screen can be readily removed and it may be cleaned by reversing the flow of air through the casing.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor detailsof construction may be resorted to without departing from the spirit'or sacrificing any of the.

when so urged longitudinally.

In testimony whereofll afiix my signature.

EDWIN J. DOYVNING. 

